110 MARINE AND FISHERIES • 



5 GEORGE v., A. 1915 



E. 14. Lines of growth not regular, coarse, with numerous fine 

 between. 



Sphaerium striatinum. 

 D. 14. Beaks calyculate. 



E. 15. Rhomboidal in outline. 



Sphaerium {Musculium) partumeium. 

 C. 8. Shell trigonal in outline 

 Genus Pisidium. 



Pisidium virginicum. 



LIST OF ARTICLES CONSULTED IN THE DETERMINATION OF THE FOREGOING 



SPECIES. 



1898. Baker, F. C. — The MoUusca of the Chicago Area. The Chicago Academy of Sciences, {Natu- 

 ral History Survey) ; Bulletin No. Ill, Pt. I. 1898. 



1902. Baker, F. C. — The Mollusca of the Chicago Area, The Chicago Academy of Sciences, (Natural 

 History Survey) ; Bulletin No. Ill, Pt. II. 1902. 



1911. Baker, F. C. — The Lymnaeidae of North and Middle America. The Chicago Academy 

 of Sciences: Special Publication No. 3, 1911. 



1865. BiNNEY, W. G. — Land and Fresh-water Shells of North America, Pts. II and III. Qmithr 

 sonian Miscellaneous Collections: (143, 144) vol. VII, 1867. 



1870. BiNNET, W. G. — Report of the Invertebrata of Massachusetts (A. A. Gould, edited by 

 Binney) Boston, 1870. 



1901. Grand ALL, O. A. — The American Physae, Nautilus, 1901. 



1905. Dall, W. H. — Land and Fresh-water MoUusks. Harriman Alaska Expedition, vol. XIII, 

 New York, 1905. 



1882. Latchford, F. R. — Notes on the Ottawa Unionidse, Transactions Ottawa Field Naturalists' 

 Club, No. 3, Ottawa, 1881-82. 



1865. Prime, T. — Monograph of American Corbiculidae. Smithsonian Miscellaneous Collecnuno. 

 (145) vol. VII, 1867. 



1858. Say, T. — The Complete Writings of Thos. Say on the Conchology of the United States. 

 Edited by W. G. Binney, New York, 1858. 



1900. Simpson, Chas. T. — Synopsis of the Naiades or Pearly Fresh- Water Mussels. Proceedings 

 of the U. S. National Museum: vol. XXII-, Washington, 1900. 



1873. Tryon, G. W., .Jr.— Land and Fresh-water Shells of North America, Pt. IV, Smith- 

 sonian Miscellaneous Collections (253) vol. 16; Washington 1873. 



